NY cabs don’t change oil. They replace the filter every 2,000 miles and top off the oil.
How many miles do they get on the engine doing that?
People freak but we have never had a vehicle that we didn’t drive over 100,000 and my husband only changes the oil once or maybe 2Xs a year, we do use Slick 50 after 50,000 miles. We rarely have mechanical problems and if we do, I get rid of it.